You are given following three lenses. Which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?

You are given following three lenses. Which two lenses will you use as

1.	You are given following three lenses. Which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?
Answer» An astronomical telescope has an eyepiece of shorter aperture and shorter focal length while an objective of longer aperture and longer focal length. Therefore, we will use L₃ as eyepiece and L₁ as objective.

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You are given following three lenses. Which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?

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